Master Key Systems MKS Limited
Master Key Systems MKS Limited
01902 737 672

Promaster Open Profile (Yale A1)

BSEN 1303 2005 Accredited Report No 155102

Grade 6 Durability (100,000 cycles) Security Grade 6 Drill Resistance 2

Standard Yale A1 section
Open Keyway Blanks & Cut Keys available from Reputable Locksmiths.

Promaster Open Profile (Yale A1)

Available Finishes

  • Satin Nickle Plate (standard)
  • Satin Brass (standard)

Cylinder Type

  • Euro Profile
  • Oval Profile
  • Rim (Yale type)
  • Padlocks

Cylinder Variant

  • Single (1/2 Cylinder) 40-50mm Oval (45mm)
  • Double 60-100mm Oval (70mm)
  • Thumb Turn 60-100mm Oval (70mm)


  • Master Keying
  • Suiting (All keyed the same i.e operated by same key)
  • Standard Differ (own individual key not operated by any other key) See separate Page PRO Series

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